Water-heater.



`Is. SWEET. WATER HEATER. APPLICATION .FILED FELIZ. I9I1.

1,277,664 PatentedSe ',1918.

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PatentedSept. 3,1918. 2 SHEETS-SHEET 2 www@ IN V EN TOR.

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l GEORGE sWEE'r,l or OAKLAND, CALIFORNIA. p

` WATER-HEATER;

Larnaca.

l YSpe-ciicaton of Letters Patent.

Patenten sept. 3,1918.

- AApplication filed February 12,1191?. Seral'No. 147,979.1

To all whom t may Concern.' .Y

Be it known that I, GEORGE SWEET, a citi zen of the United States,residing at Galzland, county of Alameda, State of California, haveinvent-ed certain new and useful- Improvements in Water-Heaters; and Ido declare the following to be a full, clear, andexact description ofthe saine, reference be-y ing had to the accompanying drawings, and

to the characters of reference marked thereon, which form a part ofthisy application.

This invention relates to .improvements in water heaters, the object ofthe invention being to produce a heater having an extensive heating areatogether with a means combined therewith for rapidly heating aV thiniilm of the water passing throughV the heater just as soon as theheating element is in operation so that there can be an iinmediatewithdrawal of the heated water from such heater.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly effective for the purposesfor which itis de signed.`

These objects I accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claim.

In the drawings similar characters of reference indicate correspondingparts in the several views. v

Figure 1 is a front elevation of the complete heater showing the doorpartly ar...

Fig. 2 is a fragmentary portion Vof the upper end of the inner tube.

Fig. 3 is a similar view of the lower end. Fig. 4 is a top plan view ofthe heating unit.

Fig. 5 is a vertical sectional view of the complete heater.

Referring now more particularly to the characters of reference on thedrawings'the numeral 1 designates the casing of the heater which may beof any desired type having a plurality of inlet openings 2VY around thelower end where the heating.

unit will be disposed, and an outlet flue 3 at the upper end.

Y ythrough the pipe 4 which extends vertically through the bottom of thecasing 1 to a point immediately above the heating unit. f

- whichV connects with a coil`7 and the 'other conn'ectsfwith az'coil 8,the coil 7 being spaced within the coil 8. TheV pipe 4 extends onupwardly from the branches 5 and Gand connects with a main cylindricaltube 9, of af larger diameter vthan the said pipe 4, such tube 9reducing in size' at its lower endl() for connection with the saidr pipe4. At this point of reduction an inner tube 11 is projected into thetube 9 and is of a slightly lessery diameter than the' tube 9 forming anintervening space v12. Both ends of this tube 9: are pressed in theinanner illustrated in Fig. '2, 'closing it coinpletely, and forcing thewater passing through the pipe 4 `to divide` and run through the space12. The upper end of the tube 9 is constructed similarly to the lowerend, that is, it reduces as at 10a, to connect with another pipe 4a ofthe same diameter as the pipe 4.` In making this structure the tube 11is projected in the tube 9 and the reduced ends 10 and 10? are thenbrazed onto the tube 9 after having been fitted firmly against the tube11. This is the preferable form of construction although of course,other desiredV methods might be employed. The pipe4a has a pair Lofbranchesa and'6a which receive the terminals of the coils 7 and 8respectively. The pipe 4a projects through thetop' of the casing 1 andis provided with two lock nuts 13 and 14, one on each side of the top ofthe casing whereby Vthe heating area is suspended in desired positionwithin the casing 1. The heating unit comprises two annular passage ways15 and 16, spaced one within the other and connected by radial passageways 17.- These passage ways are of a considerable depth as shown andprovided with burner outlets 18. Two inletV pipes 19 communicate withthe passage way 15 for the admission of gas. The depth of the passageways 15 and 16 allows of a pre-heating and expansion of the gas prior toits passing out through the openings .18 so that when combustion takesplace I vattain the greatest degree of heat units possible, .which ofcourse greatly increases the efficiency of Vthe heater. The water isconveyed to the heating area Y The burning gas passes up through thecoils 7 and 8 and around the tube 9. There is a film of water passingthrough the space 12 and thisV tends to heat very rapidly so that whenthe water is drawn from the heater when in operation it is but a veryshort time before it is thoroughly heated. The spaced coils incombination with the vertical double tubing presents a ygreat amount ofheating area to the flame. In addition to this, as each coil and eachtube becomes thoroughly heatedl it tends ,to hold all the heat units inthe casing 1 and not allow any waste thereof. The .air for combustionpurposes is admitted through the openings 2, n

From .the foregoing description it will Y'be apparent that I have awater heater having some very advantageous features for yproviding quickaction lon the film of lwater in the chamber lQtOgether with a. specialconstruction forutilizing as many of the heat unitsy as possible. d

It -will also appear from the above de-v scription that I have producedsuch a device as substantially :fulfils the object of the invention` asyset fort-h herein.

Iliile this specification -sets forth vin detail the present ,andpreferred Vconstruction of the device, still in practice such deviationsfrom such detail may be resorted to as do not form a departure from thespirit of the invention as dened by the appended claim.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters Patent is:

A water heater comprising a heating chamber, a pair ofy tubular membersof different diametersA arranged one within the other inside Ltheheating chamber, the outer member being gradually vreduced at its endsto form an inlet and an outlet forconnection with .water pipes, theinner member engaging :and Vbeing held in position by the shoulders, ofthe reducing portions of the outer member and being pressed inwardly at.its ends to 4close the same and form passageways from the outer memberproper to ithe inlet and outlet thereof.

In testimony whereof I aiiix my signature.

GEORGE SWEET.

Copies ofthis Apatent may .be ohtainedgfor ve ,cents earch, by,addressingthe IGommissioner'of Patents,

Washington, D. CB

